adb:failed to install Failure [INSTALL_FAILED_VERSION_DOWNGRADE: Package Verification Result

adb安装apk的时候报错adb:failed to install Failure [INSTALL_FAILED_VERSION_DOWNGRADE: Package Verification Result，
这时候我们可能重新连接手机或者重启手机，清空缓存

解决方法：删除上一个版本的apk,然后重新安装即可